of lansing



AIR INTAKE DEVICE Filed Feb. 20, 1928 Sept. 6, 1932. s. s; HARGRAVES ET AL A Cil Patented Sept. `6, 1932 UNETED STATES PATENT OFFICE; 'i

SAMUEL S. HABGRAVES, STEPHEN DE ORLOW, ANI) JAMES-W. ILFOR-IIVOF LANSING, MICHIGAN, ASSIGNORS, BY'I'ESNE ASSIGNMENTS, TO MELLING FORGING COMPANY, OF LANSING, MICHIGAN, A CORPORATION OF MICHIGAN AIR INTAKE DEVICE Application led February 20, 1928. Serial No. 255,626.

The present invention pertains to a novel construction applicable to engines of the type employing a gaseous fuel mixed with air, for the purpose of separating solid particles from such air before it is drawn into the carbureter;

This operation is accomplished by novel attachments to the fan which act on the air current thereof in such a manner as to leave the solid particles behind and permit the clean air to enter the intake pipe. The invention may take several forms, two of which are described in the following specilication and in the accompanying drawing, in which- Figure 1 is a side elevation of a gasoline engine showing the device of the invention applied thereto and illustrated in longitudinal section and Fig. 2 is a section on the line 2-2 of Figure 1.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

In Figure 1 is illustrated a gasoline engine 1 of conventional construction having a carbureter 2 and an air intake pipe 3 leading from the front end thereof.

According to the present invention the inlet end of the pipe consists of a cylindrical head 4 closed at the rear end by a disk 5 having an inwardly extending boss 6. Into the front end is fitted a collar 7 having radial arms 8 which support another boss 9 in alignment with the member 6. To the collar 7 is applied a casting comprising a hollow pulley 10 having at its front end a skirt 11 and a number of radial arms 12 which support an integral and inwardly extending sleeve 13. A. cup 14 extends forwardly from the sleeve and is provided with an outer flange 15 to which the fan 16 is secured by bolts 17. Within the hub 13 is mounted a shaft 18 having a reduced end 19 received in the aligned members 6 and 8. Bushings20-are interposed between the shaft and hub, and the forward end of the shaft has a flange 21 engaging the adjacent bushing, whereby the assembly may be clamped by a nut 22 threaded on the other end of the shaft. The forward end of the shaft has a longitudinal bore 23 communicating with a diametrical bore 24 which in turn communicates with the space between the two bushings 20. At one of the radial arms 12 is formed an oil duct 25 communicating with the cup 141 and thus adapted to supply oil inside the hub 13. At the inner end ofthe hub is provided a packing 26 retained by a cap 27.

Between the flange 15 and the fan 16 is secured the base of a deflector formed as a cup 28 overlapping the skirt 18 and spaced therefrom in order to provide a passage from the atmosphere into the skirt. The deflector surface extends from the fan towards the engine and flares outwardly with respect to the pulley assembly.

In the operation of this device, rotation of the fan drives the current of air towards the engine in the usual manner. The deector, however, due to the shape already described, causes the current to flow away f from the pulley assembly as indicated by the arrows in Figure 1. The suction in the l intake pipe 3 induced by the cylinders acts throughv the skirt 11 and interior of the deflector upon this current of air. The suction draws on the air current but, because of the deflected movementk of the latter, failsto attract the dust particles therein and consequently sucks comparatively clean air into the pipe 3. A filtering action of the intake air is thus effected, and the necessity of a breather or other filter in advance of the carbureter is overcome.

Although a specific embodiment of the invention has been illustrated and described, it will be understood that various alterations in the details of construction may be made withr out departing from the scope of the invention as indicated by the appended claim.

Vhat We claim is: In combination With the fan and air intake 5 pipe ef a gas engine', said'pipe iiaving an open end 1n the air stream of said fan, a eupshaped deeetor having one end secured t0 said fan and its other end spaced around the open end of said intake pipe. if) In Witness whereof We affix our signatures.

SAMUEL S. HARGRAVES. STEPHEN DE ORLOW. JAMES W. WILFORD. 

